DEWALT DCF891/DCF892: problems, parts and running costs

Checked: 2026-10-18

Summary

The DCF891 (hog ring anvil) and DCF892 (detent pin anvil) are 20V MAX* XR 1/2-in mid-range impact wrenches rated at 600 ft-lbs fastening and 800 ft-lbs breakaway in a sub-4 lb bare body. The recurring cautions are a tight hog ring on some sockets, one unexplained grinding-noise report, and the fact that bare-tool SKUs ship without a battery or charger. There is no published yearly cost; the ongoing spend is DEWALT 20V batteries, impact sockets and a torque wrench for final checks. Under $200 bare it is strong value for existing 20V owners.

Common problems and fixes

Grinding noise — one r/Dewalt thread reports a DCF891 that “started to make grinding noises this morning”; the exact URL was never retrieved, so there is no resolution and it is treated as an isolated report rather than a known fault. [13]
No battery or charger in the box — bare-tool SKUs include only the wrench and a belt clip; existing 20V MAX* owners avoid a platform re-buy, but first-time buyers must add a battery and charger. [1]
Not a torque wrench — DEWALT’s manual says final torque must be checked with a torque wrench, and that low battery voltage reduces fastening torque. [5]
Anvil choice matters — the DCF891 hog ring holds sockets firmly but fits tight on some of them, while the DCF892 detent pin swaps faster; owners pick based on retention versus ease of change. [12]

Parts and consumables

20V MAX batteries* (DCB205 5Ah, DCB240 4Ah, DCB205G oil-resistant 5Ah) — sold separately; no owner replacement interval is reported. [1][2]
Impact sockets — not included with bare-tool SKUs. [1][6]
Torque wrench — needed for final torque checks on joints where the exact tightness matters. [5][6]
Belt clip — included with the bare tool. [1]

Yearly running cost

Not enough data. No source publishes a per-year cost. Recurring costs are DEWALT 20V batteries and a charger (not included bare), impact sockets, and a torque wrench for final torque checks; the tool works with all DEWALT 20V batteries, so existing owners avoid platform re-buys.

When it is a good buy

Under $200 bare it is strong value for anyone already in the DEWALT 20V ecosystem; Pro Tool Reviews recorded $279 for the bare tool in its July-August 2025 tests, and a 2026 Home Depot buy-one-get-one deal worked out near $125 per tool with a free PowerStack battery and charger. [6][7][14]
$200-250 is fair; Pro Tool Reviews suggests weighing the Milwaukee 2962, which has a more compact head and a 5-year warranty, before paying up. [7]
The $329 kit with one 4Ah battery is a reasonable entry if batteries are needed; the $469 kit with two 5Ah packs and the $529 kit with two oil-resistant 5Ah packs are harder to justify unless capacity or oil resistance is specifically required. [7][8]
Above $300 bare it is weak; the DCF900 high-torque class or competitor flagships become the relevant comparison for heavy daily use. [7]